2031636461 has 4 divisors (see below), whose sum is σ = 2033456412. Its totient is φ = 2029816512.

The previous prime is 2031636457. The next prime is 2031636473. The reversal of 2031636461 is 1646361302.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1646361302 = 2 ⋅823180651.

It can be written as a sum of positive squares in 2 ways, for example, as 765628900 + 1266007561 = 27670^2 + 35581^2 .

It is a cyclic number.

It is not a de Polignac number, because 2031636461 - 2² = 2031636457 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2031636421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 908300 + ... + 910533.

It is an arithmetic number, because the mean of its divisors is an integer number (508364103).

Almost surely, 2^2031636461 is an apocalyptic number.

It is an amenable number.

2031636461 is a deficient number, since it is larger than the sum of its proper divisors (1819951).

2031636461 is a wasteful number, since it uses less digits than its factorization.

2031636461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1819950.

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 2031636461 is about 45073.6781392422. The cubic root of 2031636461 is about 1266.5295669326.

Adding to 2031636461 its reverse (1646361302), we get a palindrome (3677997763).

The spelling of 2031636461 in words is "two billion, thirty-one million, six hundred thirty-six thousand, four hundred sixty-one".